Banding-machine



UNrTED TATES PATENT OFFICE.

XVILLIAM H. MCDAVITT, OF LAl/VRENCE, ASSIGNOR TO GEORGE DRAPER & SONS,OF HOPEDALE, MASSACHUSETTS.

BANDING-MACHI NE.

SPECIFICATION forming part of Letters Patent No. 473,886, dated April26, 1892. Application filed October 5, 1891. Serial No. 407,764. (Nomodel.)

To all whom it may concern.-

Be it known that I, WILLIAM H. MoDAvITT, of Lawrence, county ofEsseX,State of Massachusetts, have invented an Improvement inBanding-Machines, of which the following de scription, in connectionwith the accompanying drawings, is a specification, like letters andfigures on the drawings representing like parts.

This invention has for its object to simplify and improve theconstruction of that class of machine employed in twisting bands to beemployed for driving spindles andthe like.

My invention is applicable to twisting two or more strands into cordsfor various uses.

My invention consists, essentially, in the combination, with a travelingcarriage having a hook for the reception of the central part of thestrands to be twisted together in the formation of a band, of anautomatically-operated latch consisting of a tilting lever placed in thepath of movement of and to arrest the backward movement of the carriageand means constantly acting to place said leverin the path of thecarriage, as and for the purpose set forth.

Figure 1 in side elevation representsa sufficient portion ofabanding-machine to enable my invention to be understood. Fig. 2 is atop or plan view of the machine shown in Fig. 1, and Fig. 3 is anenlarged perspective detail showing a latch embodying my invention.

The bed Aof the machine, the shaft B, having the loose and fast pulleysO D, the revolving head W, containing the pinions cl cl, thetwisting-hooks'G, upon which the said pinions cl are attached, thecarriage J, the guiderods U, on which it slides, the cord at, attachedto the said carriage, the pulley b, over which the cord is extended, andthe weight Q are and may be all substantially as common and as describedby like letters in Patent N 0. 391,728, granted October 23, 1888. Thecarriage J has extended from it, as herein shown, a hook c to receivethe folded or closed end of the band, the cord or equivalent Ct beingengaged with a suitable hook a, also connected to said carriage.

In accordance with my invention I desire to provide meanswhereby, whenthe operator releases the looped end of the band from the hook c, thecarriage will not immediately run back to the end of the bed, but willremain in easy reach of the operator until after a new cord to betwisted has been applied,when the carriage will be permitted to movebackward to put the proper strain upon the cord preparatory to twistingit.

In the form in which I have herein represented my invention I haveerected upon the bed A a suitable stand e, and upon this stand I havemounted a latch e, it having, as represented, a beveled or inclinedportion 6 the latch preferably having a weight, as a to normally keepits inner or beveled end up within range of a pin or projection 6 whichI have added to the usual carriage J', the said carriage in practicehaving a handle 2.

In operation let it be supposed that a cord for the production of abandhas been applied to the twisting-hooks and to the hook c and that thecarriage before twisting the band occupies a position with theprojection c more or less back of or to the right of the latch e inFig. 1. Now as the cord is twisted in the formation of the band thecarriage is drawn to the left, viewing Fig. 1, or in the direction ofthe arrow thereon, and the projection e of the carriage during itsmovement in the direction referred to will strike the inclined side ofthe latch and will tip or depress the same, so that the projection willpass the latch, as herein represented, and the weight a will immediatelyand automatically cause the latch to fly up at this time behind theprojection e The carriage will continue to travel in the directionstated until the band has been sufficiently twisted, when the operatorwill detach the looped end 3 of the band from the hook c preparatory todetaching the opposite end of the band from the twisting-spindle.

In accordance with my invention, however, when the looped end of theband, or it may be the other end, is disconnected, as stated, from thedevices holding it when being twisted the carriage, acted upon by theweight Q,will move back, or to the right in Fig. 1, only until theprojection e meets the latch. Arresting the backward movement of thecarriage at an intermediate point, as stated, leaves the hook c in easyreach of the operator when about to apply a new cord to thetwisting-hooks and to the hook 0, so that the operator does not have towalk two or three steps to the right, as is sometimes the case, toengage the carriage and bring it forward to the left and hold it thereby hand while the band is being connected with the hook c. The new cordhaving been applied, the operator will engage the latch, turn it, andlet the weight Q move the carriage to properly stretch the cord beforethe commencement of the twisting operation.

Prior to this invention I am not aware that the backward movement of thecarriage has been arrested temporarily, as described, to hold it in anintermediate position While the twisted band is being removed and a newcord applied to the twisting devices, so it is not intended to limitthis invention to the exact construction of the parts shown; but insteadI may use any equivalent-as,for instance, a springfor the weight, andthe shape of the latch and its incline may be more or less varied andyet be within the scope of this invention.

For the sake of lightness I have provided the carriage J with theprojection 6 This projection forms part of the carriage and may be ofany suitable shape so as to present an engaging portion to act upon andbe acted upon by the carriage.

Having described my invention, what I claim, and desire to secure byLetters Patent, 1s

In a banding-machine, a traveling carriage having a hook for thereception of the central part of the strands to be twisted into a band,combined with an automatically-operating latch consisting of a tiltinglever placed in the path of and adapted to arrest the backward movementof the carriage and means constantly acting to place said lever in thepath of the carriage, as and for the purpose set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

WVILLIAM H. MODAVITT.

Witnesses:

WILLIAM GHADWIoK, WILLIAM A. BROWN.

